Archive image from page 182 of Directions for laboratory work in Directions for laboratory work in physiology for the use of medical students directionsforlab00lomb Year: 1914 CIRCULATION AND OF MAMMAL. 153 DIRECTIONS TO STUDENTS CARING EOR APPARATUS. First close cock i and all clamps, then raise pressure to no mm. (55 on scale), in bottle (I) containing anticoagu- lation fluid, by using pump. Pump very carefully, or the mercury will be forced out of the manometer. Next raise bulb K until it and its tube are vertical; open clamp 4, then gradually open clamp 3, and let fluid rise
Archive image from page 182 of Directions for laboratory work in Directions for laboratory work in physiology for the use of medical students directionsforlab00lomb Year: 1914 CIRCULATION AND OF MAMMAL. 153 DIRECTIONS TO STUDENTS CARING EOR APPARATUS. First close cock i and all clamps, then raise pressure to no mm. (55 on scale), in bottle (I) containing anticoagu- lation fluid, by using pump. Pump very carefully, or the mercury will be forced out of the manometer. Next raise bulb K until it and its tube are vertical; open clamp 4, then gradually open clamp 3, and let fluid rise in tube and fill bulb; finally close clamps 3 and 4. Put bulb in dish so that any drip will be caught. Open cock i, and then gradually Fig. 31. Scheme of apparatus for studying the blood pressure of a mammal. A, tambour lever; B, pointer of a manometer float; C, time signal; D, short- circuit key; E, mercury float; F, electrodes; H, bicycle pump; I, anticoagula- tion tluid pressure bottle; J, manometer communicating with pressure bottle; K, bulb and cannula; i, cock; 2, 3, 4, clamps. open clamp 3 and fill the tubes connected with the mano- meter. When the fluid has risen as far as clamp 2, close clamp 3 and then clamp 2 and cock i. It may be necessary to introduce a vvdre into the right side of the manometer after taking off clamp 2, in order to remove the air from that portion of the manometer. If in the process of filling, air bubbles are seen in the tubes, they may be removed by rais- ing the manometer end of the system and tapping on the tubes. Clamp 3 should be closed or only slightly open
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